📐 斜接角度计算器Miter Angle Calculator

使用说明与常见问题How-to & FAQ

「斜接角度计算器」是什么？What is the Miter Angle Calculator tool?

木工斜接：输入正多边形边数（如相框 4 边、六角形 6 边）或两块板相交的夹角，算出斜切锯的角度设置和每块板的切角。For woodworking miters: enter the number of sides of a regular shape (4 for a picture frame, 6 for a hexagon) or the angle at which two boards meet, and get the miter saw setting and the cut angle on each board.

如何使用「斜接角度计算器」？How do I use the Miter Angle Calculator tool?

在「斜接角度计算器」中，填写「已知」、「边数」、「两板夹角（°，内角）」等参数，结果会随输入实时计算并显示在下方。In the Miter Angle Calculator: Fill in "Known", "Number of sides", "Corner angle (°, inside)"; results are recalculated instantly as you type.

斜接角度怎么算？How is the miter angle calculated?

正多边形的内角 = 180° × (n − 2) ÷ n，每块板切掉内角的一半。斜切锯的刻度从直角（0°）算起，所以设置值 = 90° − 内角 ÷ 2 = 180° ÷ n。相框 4 边是 45°，六边形 30°，八边形 22.5°。A regular polygon's inside angle is 180° × (n − 2) ÷ n and each board takes half of it. A miter saw reads from square (0°), so the setting = 90° − inside angle ÷ 2 = 180° ÷ n: 45° for a 4-sided frame, 30° for a hexagon, 22.5° for an octagon.

墙角不是 90° 怎么办？What if the corner is not 90°?

用量角器量出实际内角，选择「两板夹角」模式输入，工具会给出对应的锯角设置。例如 135° 的墙角，斜切锯设为 22.5°，每块板切面与板边的夹角是 67.5°。Measure the real inside angle with an angle finder and use Corner angle mode: a 135° corner needs a 22.5° miter saw setting, which leaves a 67.5° cut angle to each board's edge.

「斜接角度计算器」免费吗？需要注册吗？Is the Miter Angle Calculator free? Do I need an account?

「斜接角度计算器」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Miter Angle Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.